In most games, you are playing a character, not yourself or a personalized avatar. In this aspect, I can't see how a game can alienate anyone unless it itself is presented in a blatant way. Am I personally offended that few to none of the protagonists I play are gay? NO. In fact, in most games, you can't even identify a sexuality. As for the sex and race of the character, I can't speak from a personal offense standpoint but how often do you watch a movie or read a book and feel angry that a character isn't a black woman instead of the person the author visualized? Authors best write what they can put themselves inside. If a man can't be expected to understand the amazing, complex creature that is woman (apparently), or understand the pain and strife an inner-city kid feels because of how his grandparents were treated, how can we also expect authors, screenplay writers, and game designers to do exactly that? Diversity will come from diverse designers, not straight white male designers being browbeaten into diversity.